Abstract: The invention relates to a process for the production of contoured vehicle internal panelling supports having surfaces smooth on both sides on the basis of wood fibers by depositing an aqueous suspension of wood fiber (pulp) on a preforming screen, drying the preform, pressing and hardening. A deposited layer of fibers is dewatered to a residual water content of 20 to 25% by mass, related to the original quality of suspension, dried in an electric alternating field, then compression molded in a tool without a screen and hardened.

Abstract: An improved printing ribbon for use between a writing electrode and a permeable counterelectrode across which a pulse of predetermined magnitude and duration is applied. The material of the ribbon is such that it experiences multiple electric breakdowns causing it to be propelled through the permeable counterelectrode onto a record sheet held adjacent the permeable counterelectrode outside the sandwich. In a preferred embodiment, the ribbon is provided with a metallized coating which serves as the permeable counterelectrode.

Abstract: A matrix printing head for use in a thermoelectric printing process has a plurality of electrical conductors which are fixed in predetermined relationship to one another. The conductors are disposed in a plurality of plates, and the plates are fixed in predetermined relationship to each other to form a matrix of electrical conductors. The plates may be made of an electrically conductive material and have insulating slots cut completely through the plates to form the conductors. The plates are then stacked, sandwich fashion, with a layer of insulating material between each plate. The plates and layers may be pinned to insure accurate alignment, and an adhesive is applied to the surfaces of the plates and insulating layers. The stack is then compressed and the ends of the conductors are exposed to provide a printing surface at one end and leads for the electrical connection of means to activate selected conductors at the other end.